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Studies toward Antarctic Micrometeorite classification using abundant collection

利用丰富的藏品进行南极微陨石分类研究

基本信息

批准号：
11440163
负责人：
NOGAMI Ken-ichi
金额：
$ 8.9万
依托单位：
National Institute of Polar Research
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B)
财政年份：
1999
资助国家：
日本
起止时间：
1999 至 2002
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-11440163/
关键词：
Cosmic dust Antarctic micrometeorite Yamato mountains Dome Fuji Tottuki

项目摘要

We studied abundant Antarctic Micrometeorites collected by JARE-37, 38, 39 and 41, where JARE is Japanese Antarctic Research Expedition. Samples from JARE-37 and 38 were recovered from water tank for life in the Dome Fuji Station, those from JARE-39 from the Yamato meteorite bare icefield, and those from JARE-41 from the Tottuki bare ice area. Especially, important results were obtained from the study focused on the hydrously altered minerals. Generally, most of cosmic dust consists of hydrously altered minerals (more than 50%). On the other hand, meteorites consisting of hydrous minerals are limited to carbonaceous chondrites (〜1%). This mode of difference suggests that hydrous minerals in space fall as mostly cosmic dust, being ascribed from the fragile substance of the material. We found that recent fell Tagish Lake meteorite, which is a new type of hydrously altered carbonaceous chondrite, has a close relationship with the Antarctic micrometeorites.In the 4th year of our research period, we summarized our study and compiled our 18 published papers, list of 41 abstracts and catalog of Japanese Antarctic Micrometeorites with more than 300 pages.

我们研究了日本南极研究考察队JARE-37、38、39和41号收集的大量南极微陨石。JARE-37和38的样品是从Dome Fuji站的生活水箱中回收的，JARE-39的样品是从大和陨石裸冰原中回收的，JARE-41的样品是从Tottuki裸冰区回收的。特别是对水蚀变矿物的研究取得了重要成果。一般来说，大多数宇宙尘埃由水蚀变矿物组成（超过50%）。另一方面，由含水矿物组成的陨石仅限于碳质陨石（101%）。这种差异模式表明，含水矿物在太空中主要是宇宙尘埃，归因于材料的脆弱物质。我们发现新近坠落的塔吉什湖陨石是一种新的水蚀变碳质球粒陨石，它与南极微陨石有着密切的关系，在研究的第4年，我们总结了我们的研究工作，整理了我们发表的18篇论文、41篇摘要和300多页的日本南极微陨石目录。